xcopeley



H.E.GOP EL-EY. RIVET.

No. 101,352. I Patented Mar. 29, 1876 1710 e zziL-oz'.

' drawings.

dint-trill state we (twice Letters Patent N 101,352, (la-tell March 29, 1870..

IMPROVEMENT IN RIVETS.

The Schedule referred to in these Letters Patent-and making part 0! the lime.

To all whom it may concern Be it known that I, Huarrnnnv E. Uornnuv, of

"Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement Rivets and Rivet-Sets; and 1 do hereby declare that the following is a full, clear, and exact descliption of the same, reference being had to the accompanying This invention consists in a rivet having its point made of conical form, and a punch or set having a conical recess,L-'whereby rivet is centered in the closing or.

riveting punch, and the riveting is enabled to be performed more uniformly all around the point, and security is obtained with a less displacement of metal than when the point is made of fiat or irregular shape, and a very neat and ornamental appearance is given to the end of the rivet.

Figure 1 is a side view of a rivet constructed according to my invention.

Figure 2 exhibits a similar View of the. same, rep resenting it inserted through two thicknesses of matcrial which are to be secured together by it, and showing the closing or riveting-punch applied to its point ready for riveting, the material and the punch being shown in section.

Figure 3 represents a longitudinal section of the rivet, showiug'it closed or riveted upon the material.

Similar letters of reference indicate corresponding parts in the several figures.

-A is the rivet.

The conical point, which constitutes my invention, is-shown at a in figs. 1 and 2.-

ln other respects the rivet may be of the common or any suitable form, but it is represented, in fig. 3, \i'ith a conical cavity, b, in the center of the head, for

the purpose of centering. it in or upon a die of correspending form.

The closiug'or riveting-punch B to be used for the rivet has a conical cavity, 0, in its center, as shown in fig. 2, tlie outer cumference of the said cavity being somewhat less than that (if the point of the rivet, and the angle of the cone of the cavity being somewhat more acute, so that, when the point of the rivet is received into the said cavity, as shown infig. 2, it will not bottom therein, but'the edgeonly of the'EaRTcavity will bear upon the rivet. I

The eud" of the punch is=countersunk around the cavity 0.

W'hen the rivet is placed'betweeu the. punch and die for closing it, and pressure is applied to the punch, the latter displaces the metal around the circumference of the end of the rivet, and turns it over all around, as shown at c a in fig. 3, in a uniform manner, and a very neat appearance is givento the end of the rivet. Moreover, the riveting is performed effectively by a less pressure, which is of especial advan* tage when the riveting is done in a pair of pliers, as is often the case when rivetsare employed for light work, such as securing buttons to garments and other like operations. Y

What 1 claim as my invention, and desire to secure by Letters Patent, is-

1. The punch or set E, constructed with a central cavity, 0, and countersink around it, for operation substantially as set forth. V

2. A rivet finished with the punch or set B, essentially as specified.

\Vitnesses: H. E. .COPELEY.

FRED. Haynes, 11-. E. RABEAU. 

